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var(--accent);outline-offset:3px}button{touch-action:manipulation}a{color:var(--accent)}.icon{flex-shrink:0;vertical-align:middle}.app-shell{max-width:1500px;margin:auto;padding:20px 28px max(24px,env(safe-area-inset-bottom))}.topbar{display:flex;align-items:center;justify-content:space-between;gap:20px;max-width:1160px;margin:0 auto 22px}.brand-cluster,.brand,.topbar-actions{display:flex;align-items:center;gap:12px}.topbar{flex-wrap:wrap}.topbar-actions{margin-left:auto;--feedback-ink:var(--text)}.topbar-actions [data-feedback-mount]{display:inline-flex;flex:none}.brand-mark{width:43px;height:43px;background:var(--accent);color:#14273a;display:grid;place-items:center;border-radius:13px;font-size:26px;font-weight:800;box-shadow:inset 0 -3px #23384f33}.brand-name{font-size:17px;line-height:1.15;letter-spacing:.015em;font-weight:800;margin:0}.brand-name 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button:hover{background:#486c82}.piece-arrival-hidden{opacity:0}.piece-flight{position:absolute;z-index:5;display:grid;width:12.5%;height:12.5%;place-items:center;pointer-events:none;animation:piece-flight .36s cubic-bezier(.22,.78,.24,1) both}.piece-flight .chess-piece{filter:drop-shadow(0 6px 5px #0b203750)}@keyframes piece-flight{0%{transform:translate(0)}55%{transform:translate(var(--flight-mid-x),var(--flight-mid-y)) scale(1.06)}to{transform:translate(var(--flight-x),var(--flight-y))}}.capture-burst{position:absolute;width:12.5%;height:12.5%;z-index:6;pointer-events:none}.capture-burst i{position:absolute;left:calc(50% + var(--pixel-x));top:calc(50% + var(--pixel-y));width:6px;height:6px;background:#fcf8e8;animation:capture-pixel .7s ease-out both;animation-delay:var(--pixel-delay)}.capture-burst--b i{background:#182a3c;box-shadow:0 0 0 1px #dce8ed88}@keyframes capture-pixel{0%{opacity:0;transform:scale(.5)}18%{opacity:1}to{opacity:0;transform:translate(var(--pixel-dx),var(--pixel-dy)) scale(.1) rotate(var(--pixel-rotation))}}.board-announcement{position:absolute;z-index:8;text-align:center;display:grid;gap:7px;left:50%;transform:translate(-50%);background:#122d41ee;border:1px solid #8ac5df;box-shadow:0 8px 30px #001a3155;color:#fff}.board-announcement--turn-stop{bottom:15px;padding:11px 20px;border-radius:12px;pointer-events:none;white-space:nowrap;animation:notice-in .2s ease-out}.board-announcement--turn-stop strong{font-size:17px;color:#fae3a5}.board-announcement--turn-stop span{font-size:12px;color:#d4e6f1}.board-announcement--result{top:50%;transform:translate(-50%,-50%);width:76%;padding:24px 16px;border-radius:18px;border-color:#e6c877;gap:10px}.board-announcement--result small{font-size:12px;letter-spacing:.14em;color:#c5d2de}.board-announcement--result strong{font-size:clamp(21px,4.5vw,34px);color:#f4dc9f;line-height:1.2}.board-announcement--result>span{font-size:14px}.board-announcement--result button{display:flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:9px;background:#95d7f6;color:#19364a;min-height:44px;margin-top:7px;font-weight:700;font-size:14px}@keyframes notice-in{0%{opacity:0;bottom:8px}to{opacity:1;bottom:15px}}@media(min-width:1400px){.game-layout{--board-size: min( calc(100svh - 220px) , calc(100vw - 480px) ,820px);grid-template-columns:var(--board-size) 360px}.panel-status{padding:24px}.panel-status h2{font-size:28px}.move-progress{padding:0 24px 20px}.move-card{padding:15px 10px}.move-card-copy strong{font-size:14px}}@media(max-width:899px)and (orientation:portrait),(max-width:699px)and (orientation:landscape)and (min-height:600.02px),(max-width:479px)and (orientation:landscape){.app-shell{padding:14px 16px 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